prevent your PC from going to sleep
Caffeine is a simple, standalone utility, that can prevent your PC from going to sleep, locking the screen or activating the screensaver. It does this by simulating a key press every 59 seconds, pretending that you are still working on the computer. The program runs in the system tray and can be enabled or disabled by double-clicking the icon. Caffeine also supports several command-line switches for advanced users that want to automate or schedule the program.
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